Design a Q&A platform domain model with users, questions, answers, comments, tags, votes, an accepted-answer rule, and a reputation policy, with the voting, acceptance, and reputation invariants enforced in the model.
Design a question-and-answer platform where users post questions and answers, add comments and tags, vote posts up or down, and the question's author accepts one answer. Reputation changes with votes and acceptance. Start by clarifying scope and the core objects.
Work in the provided coding workspace while explaining your decisions to the live interviewer. Validation may use inline tests, examples, comments, or a verbal walkthrough.
Practice this problem in the live coding workspace while the interviewer probes your clarification, implementation, trade-offs, and validation.
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